CY7C68300C_09 Datasheet, PDF (24/41 Pages) Cypress Semiconductor – EZ-USB AT2LP™ USB 2.0 to ATA/ATAPI Bridge

CY7C68300C, CY7C68301C
CY7C68320C, CY7C68321C
Table 11. Configuration Data Organization (continued)
Byte
Address
Configuration
Item Name
0x08
BUTTON_MODE
Configuration
Item Description
Required
Contents
Bit 7
Button mode (100-pin package only). Sets ATAPUEN,
PWR500# and DRVPWRVLD to become button inputs
returned on bits 2, 1, and 0 of EP1IN. This bit must be set to
‘0’ if the 56-pin packages are used.
0 = Disable button mode.
1 = Enable button mode.
Variable
Contents
0x78
SEARCH_ATA_BUS
BIG_PACKAGE
ATA_EN
Reserved
Reserved
Drive Power Valid Polarity
Drive Power Valid Enable
Bit 6
Search ATA bus after RESET to detect non-removable ATA
and ATAPI devices. Systems with only a removable device
(such as CF readers) must set this bit to ‘0’. Systems with at
least one non-removable device must set this bit to ‘1’.
0 = Do not search for ATA devices.
1 = Search for ATA devices.
Bit 5
Selects the 100- or 56-pin package pinout configuration.
Using the wrong pinout may result in unpredictable behavior.
0 = Use 56-pin package pinout.
1 = Use 100-pin package pinout.
Bit 4
Drive ATA bus when AT2LP is in suspend. For designs in
which the ATA bus is shared between the AT2LP and
another ATA master (such as an MP3 player), the AT2LP
can place the ATA interface pins in a Hi-Z state when it
enters suspend. For designs that do not share the ATA bus,
the ATA signals must be driven while the AT2LP is in
suspend to avoid floating signals.
0 = Drive ATA signals when AT2LP is in suspend.
1 = Set ATA signals to Hi-Z when AT2LP is in suspend.
Bit 3
Reserved. This bit must be set to ‘0’.
Bit 2
Reserved. This bit must be set to ‘0’
Bit 1
Configure the logical polarity of the DRVPWRVLD input pin.
0 = Active LOW (‘connector ground’ indication)
1 = Active HIGH (power indication from device)
Bit 0
Enable the DRVPWRVLD pin. When this pin is enabled, the
AT2LP enumerates a removable ATA device, such as
CompactFlash or MicroDrive, as the IDE master device.
Enabling this pin also affects other pins related to removable
device operation.
0 = Disable removable ATA device support.
1 = Enable removable ATA device support.
Document 001-05809 Rev. *C
Page 24 of 41
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